ah ok. i dont have this behavior.
It happened to me in alpha 18 also.
This used to always happen to me, but with the latest builds, I don’t see this error except for very rarely. 
Edited on 4/20/17 to add: And I just saw this yesterday again.

still seeing this with release 707 of a 21
but only the ones that were against a wall or cliff
Still present as of A22 r729. Triggers not only near cliffs/water but also near harvestable stones and/or resource nodes (tumbleweeds, pear cacti etc).
I have had this show up for the building part and it showed a spot not being put in… it was filled when you allow them to build a little part of it, tell them to stop and allow them to build it again… fixed (or it might be just me)
This still happens and has been annoying me to no end, but I thought of a solution: Why not get rid of the issue by not having the dirt dug up? Like what happens when a camp spawns on a mountain. Since they function just fine without it, why was this even added to begin with? Something that was necessary for an early alpha?
Ok, so the new builder has fixed the issue of the spot where the dirt pile was not being set to be filled in, but now there is a whole other issue. Right when a hearthling picked up the pile of dirt, the building showed there wasn’t enough resources to build it. The hearthling who had the dirt started to build it until they got hungry. Now none of them will build it. Even if I tell all my hearthlings to only build, they will just go idle. In addition, clicking the area brings up the old builder gui.
So I have to ask, why do you still have this feature? Either just put the camp ontop of the ground like the smaller camps and the camps that spawn in the mountain. Or, just change the dirt pile to a pile of clay, and let us replace stone and dirt.The problem is they’re still using the old builder system for it instead of migrating it to the new builder system.
